made the pack completely portable and wrote relevent bat files to go with it

gitportable/mingw64/share/git-gui/lib/win32.tcl

@@ -0,0 +1,26 @@
+# git-gui Misc. native Windows 32 support
+# Copyright (C) 2007 Shawn Pearce
+
+proc win32_read_lnk {lnk_path} {
+	return [exec cscript.exe \
+		/E:jscript \
+		/nologo \
+		[file join $::oguilib win32_shortcut.js] \
+		$lnk_path]
+}
+
+proc win32_create_lnk {lnk_path lnk_exec lnk_dir} {
+	global oguilib
+
+	set lnk_args [lrange $lnk_exec 1 end]
+	set lnk_exec [lindex $lnk_exec 0]
+
+	eval [list exec wscript.exe \
+		/E:jscript \
+		/nologo \
+		[file nativename [file join $oguilib win32_shortcut.js]] \
+		$lnk_path \
+		[file nativename [file join $oguilib git-gui.ico]] \
+		$lnk_dir \
+		$lnk_exec] $lnk_args
+}